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<title>Object Property: IAO_0000221</title>
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<h1>Object Property: IAO_0000221</h1>
<h2 class='summaryURI'>http://purl.obolibrary.org/obo/IAO_0000221</h2>
<h2>Asserted Object Property Hierarchy</h2>
<div class='codebox' id='asserted_object_property_hierarchy'>
<ul class='minihierarchy'>
<li><span class='active-entity'>IAO_0000221</span></li><ul class='minihierarchy'>
</ul>
</ul>
</div><!-- asserted object property hierarchy -->
<h2>Annotations (8)</h2>
<div class='codebox' id='annotations_(8)'>
<ul>
<li>
<span class='annotation-uri'>http://purl.obolibrary.org/obo/IAO_0000115:</span> <span class='literal'>"m is a quality measurement of q at t when
q is a quality 
there is a measurement process p that has specified output m, a measurement datum, that is about q"</span> (string)</li>
<li>
<span class='annotation-uri'>http://purl.obolibrary.org/obo/IAO_0000116:</span> <span class='literal'>"8/6/2009 Alan Ruttenberg: The strategy is to be rather specific with this relationship. There are other kinds of measurements that are not of qualities, such as those that measure time. We will add these as separate properties for the moment and see about generalizing later"</span> (string)</li>
<li>
<span class='annotation-uri'>http://purl.obolibrary.org/obo/IAO_0000116:</span> <span class='literal'>"From the second IAO workshop [Alan Ruttenberg 8/6/2009: not completely current, though bringing in comparison is probably important]

This one is the one we are struggling with at the moment. The issue is what a measurement measures. On the one hand saying that it measures the quality would include it "measuring" the bearer = referring to the bearer in the measurement. However this makes comparisons of two different things not possible. On the other hand not having it inhere in the bearer, on the face of it, breaks the audit trail.

Werner suggests a solution based on "Magnitudes" a proposal for which we are awaiting details.
--
From the second IAO workshop, various comments, [commented on by Alan Ruttenberg 8/6/2009]

unit of measure is a quality, e.g. the length of a ruler.

[We decided to hedge on what units of measure are, instead talking about measurement unit labels, which are the information content entities that are about whatever measurement units are. For IAO we need that information entity in any case. See the term measurement unit label]

[Some struggling with the various subflavors of is_about. We subsequently removed the relation represents, and describes until and only when we have a better theory]

a represents b means either a denotes b or a describes

describe:
a describes b means a is about b and a allows an inference of at least one quality of b

We have had a long discussion about denotes versus describes."</span> (string)</li>
<li>
<span class='annotation-uri'>http://purl.obolibrary.org/obo/IAO_0000116:</span> <span class='literal'>"From the second IAO workshop: An attempt at tieing the quality to the measurement datum more carefully.

a is a magnitude means a is a determinate quality particular inhering in some bearer b existing at a time t that can be represented/denoted by an information content entity e that has parts denoting a unit of measure, a number, and b. The unit of measure is an instance of the determinable quality."</span> (string)</li>
<li>
<span class='annotation-uri'>http://purl.obolibrary.org/obo/IAO_0000116:</span> <span class='literal'>"From the second meeting on IAO:

An attempt at defining assay using Barry's "reliability" wording

assay:
process and has_input some material entity
and has_output some information content entity 
and which is such that instances of this process type reliably generate 
outputs that describes the input."</span> (string)</li>
<li>
<span class='annotation-uri'>http://purl.obolibrary.org/obo/IAO_0000116:</span> <span class='literal'>"This one is the one we are struggling with at the moment. The issue is what a measurement measures. On the one hand saying that it measures the quality would include it "measuring" the bearer = referring to the bearer in the measurement. However this makes comparisons of two different things not possible. On the other hand not having it inhere in the bearer, on the face of it, breaks the audit trail.

Werner suggests a solution based on "Magnitudes" a proposal for which we are awaiting details."</span> (string)</li>
<li>
<span class='annotation-uri'>http://purl.obolibrary.org/obo/IAO_0000117:</span> <span class='literal'>"Alan Ruttenberg"</span> (string)</li>
<li>
<span class='annotation-uri'>label:</span> <span class='literal'>"is quality measurement of"</span> (string)</li>
</ul>
</div><!-- annotations (8) -->
<h2>Domains (1)</h2>
<div class='codebox' id='domains_(1)'>
<ul>
<li>
<a href="../classes/IAO_0000109___1970712607.html" title="http://purl.obolibrary.org/obo/IAO_0000109">IAO_0000109</a></li>
</ul>
</div><!-- domains (1) -->
<h2>Ranges (1)</h2>
<div class='codebox' id='ranges_(1)'>
<ul>
<li>
<a href="../classes/Quality___-561356810.html" title="http://www.ifomis.org/bfo/1.1/snap#Quality">Quality</a></li>
</ul>
</div><!-- ranges (1) -->
<h2>Inverses (1)</h2>
<div class='codebox' id='inverses_(1)'>
<ul>
<li>
<a href="IAO_0000417___1180510399.html" title="http://purl.obolibrary.org/obo/IAO_0000417">IAO_0000417</a></li>
</ul>
</div><!-- inverses (1) -->
<h2>Superproperties (1)</h2>
<div class='codebox' id='superproperties_(1)'>
<ul>
<li>
<a href="IAO_0000136___-463729275.html" title="http://purl.obolibrary.org/obo/IAO_0000136">IAO_0000136</a></li>
</ul>
</div><!-- superproperties (1) -->
<h2>Usage (4)</h2>
<div class='codebox' id='usage_(4)'>
<ul>
<li>
<a href="IAO_0000417___1180510399.html" title="http://purl.obolibrary.org/obo/IAO_0000417">IAO_0000417</a> <span class='keyword'>inv</span> <span class='active-entity'>IAO_0000221</span></li>
<li>
<a href="../classes/IAO_0000408___560335261.html" title="http://purl.obolibrary.org/obo/IAO_0000408">IAO_0000408</a> <span class='keyword'>⊆</span> <span class='active-entity'>IAO_0000221</span> <span class='some'>some</span> <a href="../classes/PATO_0000122___-988386181.html" title="http://purl.org/obo/owl/PATO#PATO_0000122">PATO_0000122</a></li>
<li>
<a href="../classes/IAO_0000414___-1887984222.html" title="http://purl.obolibrary.org/obo/IAO_0000414">IAO_0000414</a> <span class='keyword'>⊆</span> (<a href="IAO_0000039___347854339.html" title="http://purl.obolibrary.org/obo/IAO_0000039">IAO_0000039</a> <span class='only'>only</span> <a href="../classes/UO_0000002___1561699898.html" title="http://purl.org/obo/owl/UO#UO_0000002">UO_0000002</a>) <span class='keyword'>and</span> (<span class='active-entity'>IAO_0000221</span> <span class='only'>only</span> <a href="../classes/PATO_0000125___1861198072.html" title="http://purl.org/obo/owl/PATO#PATO_0000125">PATO_0000125</a>)</li>
<li>
<span class='active-entity'>IAO_0000221</span> <span class='keyword'>⊆</span> <a href="IAO_0000136___-463729275.html" title="http://purl.obolibrary.org/obo/IAO_0000136">IAO_0000136</a></li>
</ul>
</div><!-- usage (4) -->
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